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MicroVAX I: Properly boot all VMS versions with differently located SYSBOOT

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Different versions of VMS on different VAX systems default to different
locations for the secondary bootstrap program SYSBOOT.EXE.  Some
have it at [SYSEXE]SYSBOOT.EXE and others have it at
[SYS0.SYSEXE]SYSBOOT.EXE.

Digital sold different MicroVAX I and VAXStation I systems with different
boot ROMs that defaulted to look in one of these locations but not
consistently across systems that were sold.

This change uses the existing KA610 ROM image (that supports both
MicroVAX I and VAXStation I systems) and defaults to look for the
secondary bootstrap in [SYSEXE]SYSBOOT.EXE.  If the boot attempt
fails, on the currently connected disk, it retries looking for the
secondary bootstrap in [SYS0.SYSEXE]SYSBOOT.EXE.

This retry process does not work on the VAXStation I.  In order to boot
from disks which have SYSBOOT.EXE located in [SYS0.SYSEXE] you can
execute

    sim> BOOT /R5=100

and when you are prompted in the video screen with:

   Bootfile:

merely enter:

   Bootfile:[SYS0.SYSEXE]SYSBOOT.EXE
This commit is contained in:
Mark Pizzolato
2023-06-27 13:53:39 -10:00
parent 91e2e4beb9
commit dd406478e4
1 changed files with 39 additions and 1 deletions
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40
VAX/vax610_sysdev.c
View File

@@ -33,7 +33,7 @@
#include "vax_defs.h"
#include "vax_ka610_bin.h" /* Defines BOOT_CODE_FILENAME and BOOT_CODE_ARRAY, etc */
#include "vax_ka610_bin.h" /* Defines MicroVAX I and VAXStation I BOOT_CODE_FILENAME and BOOT_CODE_ARRAY, etc */
/* MicroVAX I boot device definitions */
@@ -497,10 +497,48 @@ return cc;
t_stat cpu_boot (int32 unitno, DEVICE *dptr)
{
t_stat r;
int32 saved_quiet = sim_quiet;
const char *sysboot = "[SYS0.SYSEXE]SYSBOOT.EXE";
char cmd[CBUFSIZE];
if ((R[5] & 0x100) != 0)
sim_quiet = TRUE;
r = cpu_load_bootcode (BOOT_CODE_FILENAME, BOOT_CODE_ARRAY, BOOT_CODE_SIZE, FALSE, 0x200, BOOT_CODE_FILEPATH, BOOT_CODE_CHECKSUM);
if (r != SCPE_OK)
return r;
sim_quiet = saved_quiet;
if ((R[5] & 0x100) == 0) {
snprintf (cmd, sizeof (cmd), "\"%%BOOT-F-ERROR, Program image not found DUA\" "
"ECHO;"
"BOOT /R5=%X %4.4s",
R[5] | 0X100, (R[0] == 0) ? "" : (char *)&R[0]);
expect_cmd (1, cmd);
snprintf (cmd, sizeof (cmd), "\"%%BOOT-F-ERROR, None of the bootable devices contain a program image\" "
"ECHO;"
"BOOT /R5=%X %4.4s",
R[5] | 0X100, (R[0] == 0) ? "" : (char *)&R[0]);
expect_cmd (1, cmd);
snprintf (cmd, sizeof (cmd), "\"%%BOOT-F-ERROR, Boot device I/O error XQA\" "
"ECHO;"
"BOOT /R5=%X %4.4s",
R[5] | 0X100, (R[0] == 0) ? "" : (char *)&R[0]);
expect_cmd (1, cmd);
snprintf (cmd, sizeof (cmd), "\"%%BOOT-F-ERROR, No response from load server XQA\" "
"ECHO;"
"BOOT /R5=%X %4.4s",
R[5] | 0X100, (R[0] == 0) ? "" : (char *)&R[0]);
expect_cmd (1, cmd);
snprintf (cmd, sizeof (cmd), "\"Bootfile:\" SEND \"%s\r\";"
"CONTINUE", sysboot);
expect_cmd (1, cmd);
expect_cmd (1, "\"VAX/VMS\" "
"NOEXPECT \"Bootfile:\";"
"NOEXPECT \"%%BOOT-F-ERROR, Program image not found DUA\";"
"NOEXPECT \"%%BOOT-F-ERROR, None of the bootable devices contain a program image\";"
"NOEXPECT \"%%BOOT-F-ERROR, Boot device I/O error XQA\";"
"NOEXPECT \"%%BOOT-F-ERROR, No response from load server XQA\";"
"CONTINUE");
}
SP = PC = 512;
AP = 1;
return SCPE_OK;